<div class="center">
    <input type="button" class="chat-btn" onmouseover="this.style.background='#ff6600';" onmouseout="this.style.background='green';" 
         value="免费QQ咨询眼科专家,QQ:$site(qq)"
        style="width:400px;border:solid 1px #ddd;background:green;color:#fff;font-weight:bold;padding:10px 0;font-size:14px;cursor:pointer;"/><br /><br />
</div>
